Data from mindfulness-oriented treatment studies suggest at-home formal meditation practice is the most important variable in attaining positive clinical outcomes. This conclusion supports the prevailing theory that high doses of repetitive meditation practice can elicit cortical remodeling. Since addiction has been conceptualized as a disease of staged neuroplasticity, an intensive behavioral program that can induce accelerated therapeutic neuroplasticity is particularly compelling. Current methods for self-reporting dose of formal mindfulness practice may be vulnerable to response bias and poor reporting response rates. We plan to use actigraphic monitoring of formal mindfulness practice using the Actiwatch Score to behaviorally validate meditation time and rigorously test the meditation dose effect theory which hypothesizes that formal meditation practice time will predict improvement in inhibitory control, delay discounting, and smoking outcomes.